Digging tunnels is hot, dirty, dangerous work. Since ancient times, tunnel diggers have used different types of tools to carve through mountains and bore through oozing mud.
Now it's your turn. Choose a location, pick a tunnel-digging technique, and see how long it takes you to dig a mile-long tunnel! Remember to excavate the ground with a reliable tool and to support any unstable ground around you while you dig!
Diggers often face unexpected challenges -- and disasters -- so enter at your own risk!
Having technical difficulties? Ask for help.